Unable to access Apple iCloud ID or reset password
I have an apple iCloud id which is an @icloud.com email address and I have forgotten the password for So I am unable to backup. I have tried to reset the password but I get the message it will take 24 hours to do some verification and an email will be sent to my @icloud account. My question is how do I reset the password if I don't have a password and can't access the iCloud email address to access the email it's going to send to rest the password. I appear to be in a never ending loop with no way out. Any suggestions would be great fully appreciated.
iOS 12